linux笔记： grub2的笔记

* 安装grub

# use Ubuntu live CD boot, entry TRY mode

# in terminal, run grub-install

* configure file -- /boot/grub/grub.cfg

* update grub.cfg => run update-grub

* customized grub config ==> /etc/grub.d/40_custom

* primary config /etc/default/grub

* in grub use loopback ==> loopback loop0 /ubuntu/disks/root.disk

* set loopback as root ==> set root=(loop0) 

* in Ubuntu kernal, use argument: loop=/ubuntu/disks/root.disk 

 * kernel vga setting

# old ==> vga=0x...

# new ==> gfxpayload=1024x768x16